Adjustable trestle.



R I. LOOMIS.

ADIUSTABLE TRESTLE.

APPLICATION FILED 0013. 1914.

1,147,522. Patented July 20, 1915.

Wiiweoom COLUMBIK PLANDGRAPH C0, WASHINGTON, D. C.

RALPH I. LOOMIS, or GENEVA, ILLINOIS.

ADJUSTABLE TRESTLE.

Specification of Letters Patent.

Patented Jam, 1915..

Application filed October 3, 1914. Serial No. 864,789.

To all whom it may concern: Be it known that I, RALPH I. LOOMIS, a

citizen of the United States, residing at- Geneva, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Adjustable Trestles; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to trestles for use of mechanics engaged in the various branches of the building trades.

My object is to supply a trestle that can be used to support staging at various heights, as may be required, as the work progresses, one that can be easily and readily changed from one elevation to another.

In the drawings herewith which are made a part of this application, Figure 1 is a perspective view-of one of my trestles in closed position, Fig. 2 is a perspective showing the adjustable members partly extended, Fig. 3 is a fragmentary plan view illustrating the construction of the trestle, and Fig. & is a vertical sectional View on the lines H of Fig. 1.

In materializing my invention, a cross beam 5 is supplied with spread legs 6 secured to said cross beam by means of bolts 7, a brace S is attached to said legs adjacent and below the said cross beam 5. Secured to said brace 8 midwaybetween the said legs and extending parallel with said cross beam 5 is a supplemental cross beam 9. Vertically positioned and slidably mounted upon said cross beams 5 and 9 is a frame having a top cross piece 10, a bottom cross piece 11 and two side pieces 12. The said side pieces 12 are provided with slots throughout the greater portion of their length along the medial line thereof. The side and end pieces are securelyfastened together. Apertures are formed in the tWo cross beams 5 and 9 to register withthe slots in the side pieces 12 and bolts 13 provided with wing nuts, together with elongated rectangular washers 13 secure the said side pieces 12 to the said cross beams 5 and 9 so that the said cross pieces can be moved up and down and secured at any desired height. Positioned on the under side of the spread legs 6 are the supplemental legs 14: having slots throughout the greater portion of their length along the medial line thereof. The said supplemental legs. are secured to the legs 6 by means of bolts 15 provided with wing nuts similar to the nuts 13, and elongated, rectangular washers 15. A brace 16 extends downwardly and inwardly from the under side of the end of the cross beam 5 to the top edge of the cross beam 9 and is attached thereto. All parts of the trestle are joined by bolts similar to the bolts 7- except where otherwise specified.

I have in designing my trestle, provided an adjustable support for staging from a point near the floor on the cross piece 11 in its varying positions to the cross beams 9 and 5 and then the cross piece 10in its varying positions, embracing a distance of several feet governed by the size of the trestles.

A mechanic using my trestle would not need v to have a number of trestles of various heights to prosecute his work, as a set of my trestles would fill the requirements for work on any story of a building the full height thereof. The mechanic is saved the expense of the initial investment in the number of trestles required, the expense of drayage from one place to another of so numerous a Having thus fully described my invention, what I wish to secure by Letters-Patent, is

The combination with a trestle having a cross beam anda supplemental cross beam in vertical alinement therewith, of a stage. carrying frame comprising a pair of side pieces adapted to rest against one face of said cross beams, said side pieces having slots substantially the full length thereof, a cross piece connecting each end of said side pieces, the

top cross piece being immediately over and In testimony whereof I have signed my registering with the top cross bar and the name to this specification in the presence of lower cross piece being below and registering two subscribing witnesses.

with the lower cross beam, and means c0- RALPH I. LOOMIS. operating with said cross beams and said slots to lock the frame in adjusted position on said cross beams.

Witnesses:

HEBE G. RINe UIs'r, JAs. C. LONG.

Copies of this patent may be obtained for five cents each,' byaddressing the Commissioner of Patents, Washington, D. C. 

